如何在Xcode 4.2中使用gcc 4.2 [英] How to use gcc 4.2 with Xcode 4.2

问题描述

对于一些较旧的代码，我需要使用带有Xcode 4.2的gcc 4.2。我如何让它显示
。 Xcode4.2似乎已经放弃了对它的支持。

谢谢

解决方案

这是一种在 xcode 4.2 中使用 gcc 4.2 进行编译的方法。这主要是通过命令行完成的，所以当你看到以 [15:30 jon @MacBookPro /] $ 开头的行时，你需要打开 Terminal.app 并运行在 $ 之后开始的命令。

否在此过程中，文件或目录被删除或已删除，因此如果您将来需要使用LLVM进行编译，则很容易撤消。

1. 下载 - 但不安装尚未 -

   
   
   

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   ^[1] 如果从命令行打开（使用类似 vi ， emacs ， nano 等）确保将路径括在引号/ long path / with spaces / in / file.xcspec或转义空格 / some / long \ path / with\ spaces / in\ it / file.xcspec
   

   
   
   

   ^[2] 这是必要的，因为iPhoneOS.platform SDK有自己独立的 / usr / lib 目录，但iPhoneSimulator.platform SDK不是

   
   

   I need to use gcc 4.2 with Xcode 4.2 for some older code. How do i get it to show up. Xcode4.2 seems to have dropped support for it.

   Thanks

   解决方案

   Here is a way to enable compiling with gcc 4.2 in xcode 4.2. This is mostly done via command line so when you see lines starting with: [ 15:30 jon@MacBookPro / ]$, you need to open up Terminal.app and run the command that starts after the $.

   No files or directories are removed or deleted in this process, so it is easy to undo if you need to compile with LLVM in the future.

   1. Download - but do not install yet - xcode_4.1_for_lion.dmg or xcode_4.1_for_snow_leopard.dmg

   2. Now, follow these steps to install Xcode 4.1 into /Developer-4.1:

      1. Backup the working /Developer directory (where Xcode 4.2 is installed)

      [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer /Developer-4.2
      

      2. Run the Xcode 4.1 installer using the default install location (/Developer)

      3. Move the new Xcode 4.1 installation to /Developer-4.1:

         [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer /Developer-4.1
         

      4. Move the Xcode 4.2 developer directory back to /Developer:

         [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer-4.2 /Developer
         

   3. Edit the Xcode 4.2 GCC 4.2.xcspec file to get gcc 4.2 to show in the list of compiler options ^[1]:

      [ 15:30 jon@MacBookPro / ]$ sudo vi "/Developer/Library/Xcode/PrivatePlugIns/Xcode3Core.ideplugin/Contents/SharedSupport/Developer/Library/Xcode/Plug-ins/GCC 4.2 (Plausible Blocks).xcplugin/Contents/Resources/GCC 4.2.xcspec"
      

      • Change lines 41 and 42 from this:

        ShowInCompilerSelectionPopup = NO;
        IsNoLongerSupported = YES;
        

      • To This:

        ShowInCompilerSelectionPopup = YES; 
        IsNoLongerSupported = NO;
        

   4. Backup the Xcode 4.2 iOS/Simulator Framework usr directories:

      [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer/Platforms/iPhoneOS.platform/Developer/usr /Developer/Platforms/iPhoneOS.platform/Developer/usr.backup
      [ 15:30 jon@MacBookPro / ]$ sudo mv -v /Developer/Platforms/iPhoneSimulator.platform/Developer/usr /Developer/Platforms/iPhoneSimulator.platform/Developer/usr.backup
      

   5. Copy Xcode 4.1 iOS/Simulator Framework usr directories to Xcode 4.2:

      [ 15:30 jon@MacBookPro / ]$ sudo cp -rv /Developer-4.1/Platforms/iPhoneOS.platform/Developer/usr /Developer/Platforms/iPhoneOS.platform/Developer/usr
      [ 15:30 jon@MacBookPro / ]$ sudo cp -rv /Developer-4.1/usr /Developer/Platforms/iPhoneSimulator.platform/Developer/usr
      

   6. Copy the gcc and info iOS SDK library directories from Xcode 4.1 to Xcode 4.2 ^[2]:

      [ 15:30 jon@MacBookPro / ]$ sudo cp -rv /Developer-4.1/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/usr/lib/gcc /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/usr/lib/gcc
      [ 15:30 jon@MacBookPro / ]$ sudo cp -rv /Developer-4.1/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/usr/lib/info /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/usr/lib/info
      

   7. Compile using gcc-4.2!

   This is a blog post I've written with a little more info about this process. Feel free to leave a comment on the blog if you run into any issues or have any questions.

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   ^[1] If opening from a command line (using something like vi, emacs, nano, etc) make sure to either enclose the path in quotes "/long path/with spaces/in it/file.xcspec" or escape the spaces /some/long\ path/with\ spaces/in\ it/file.xcspec
   

   ^[2] This is necessary because the iPhoneOS.platform SDK has its own seperate /usr/lib directories but the iPhoneSimulator.platform SDK does not

   这篇关于如何在Xcode 4.2中使用gcc 4.2的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！